Steam rock-drill



3 Sheets-Sheet 2.

(No Mod-I.)

" A. J. SYPHER.

STEAM ROGK DRILL.

Patented Sept.. 18, 188.8.

IJV' VEJV TOR Attorney (No Model.) y l' 3 She'vets-Svheet 3. I

, A. J. SYPHER.

STEAM ROCK DRILL. No. 389,775. Patented Sept. 18,v 1888.

Attorney NITED STATES Arnnr einen,

ABRAHAM JACKSON SYPHER, OF IRON MOUNTAIN, MISSOURI.

STEAM ROCK-DRILL.

SPECIFICATION forming part of Letters Patent No. 389,775, dated September 18, 1888.

Application filed August 6. 1887. -Serial No. 216,266.

To all whom it may concern:

Be it known that I, ABRAHAM JAoKsoN SY- PHER, a citizen of the United States, residing at Iron Mountain,in the county of St.Franois and State of Missouri, have invented certain new anduseful ImprovementsinSteam Rock-Drills; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art towhich it appertains to make anduse the same.

My invention relates to steam rock-drills.

The object of my invention is to improvel the general construction of rockdrills, especial] y that part that relates to the valve mechanism; and the nature of my invention consists in constructions and combinations, all as will hereinafter be set forth in the specification, and pointed out in the claims.

In the drawings, Figure 1 is a central vertical section on the line V, shown in Fig. 3. Fig. 2 is a front view showing section on line W, shown in Fig. 1. Fig. 3 is a central cross-section on line Y, shown in Fig. 1. Fig. 4 is a top view of section of upper head on line X, shown in Fig. 1.

A represents the cylinder,having main steampassages a a in the walls thereof, the supplemental passage a'l, and an opening, a3, closed 'by a block, a", having an arc-shaped passage, (t5, opening into the cylinder.

A is the upper cylinderhead; A2, the lower cylinder-head; A3, the piston, having inverted inclines or shoulders a, B, the casting containing the steam-chest, the valves, and the steam passages or ports; C, the gland, and D the piston-rod and tool-holder.

The casting B has a cylindrical opening or valvefseat, b, for the valve B'. The upper part of this valvev has a cove or cavity, b', which serves as a steam-chest and is connected with a steamsupply pipe by means of a passage, bz, which extends upwardly into the casting. Leading from the steam-chest are two ports, b3 b4, which alternately register with the main steam-supply passages b5 b, which form a continuation of the main supply-passages a a. The lower part is provided with coves or cavities bl bg, which alternately register with the branch exhaust-passages b9 bm of the main passages b5 b and with the steam-exhaust pas- (No model.)

sage B2, formed below the valve and extend? ing through the wall of the cylinder to the pipe B3. The blank spaces or segments be tween the passages b5 b and Zf' b1 serve as the cutoffs for the valve. In the underside of the valve is a tappet-ar1n, b1", secured by a pin, 1213. This arm projects 'downwardly through the eXhaustpassage into a slot formed in the arc-shaped valve-driver located in the arc-shaped passage in the block that lls the opening as in the cylinder. rlhis arc-shaped valve-driver is slightly longer than the passage and projects into the cylinder at a point opposite the depression in the piston and between the inverted shoulders, so that as the piston is moved upward and downward the ends of the valve-driver are alternately pushed in the passage to vibrate the valve by means of the arm secured to its under side, and thus alternately cut off the supply of steam to the main and branch passages leading to and from the cylinders. By using the block a4 and placing the tappetarm on the valve it is obvious that the greater part of the wear will be upon the block and the valve-driver, which, when they become worn, can be removed and new ones inserted without the necessity of changing the valve or any other part of the mechanism.

It is desirable in operating this class of devices to prevent the piston from pounding against the upper head of the cylinder. To prevent this pounding,lprovideaspace which, when used with the following-described means, forms an air-cushion between the piston and upper head. The means referred to are an air-passage, a, formed in the upper part of the body of the cylinder and opening at its lower end into the steampassage a and at its upper end, als, into the cylinder, a puppet or check valve, al, seated in an enlargement, as, of the passage and its stem a, extending into a recess, am, in the upper head of the cylinder, and a spiral spring, ali-coiled upon the stem for forcing the valve against its seat. When the upper end of the piston moves upwardly past the port or opening of passage ai, it forces the steam above it through the opening a against the valve al, which is pressed against its seat and prevents the steam contained between it and the head of the piston IOL) from passing through the pftsstgea; vUpon: 1:3.v Ina;1foekdrill,threcombinationoffri/niv@* i the lower endf, thelower, cylinierheztd is having a tuppeizum secured thereto, a cylinvthev Stung-box vgland C, formed intwosee kder havingau are-shaped passage, an arc-tap- 25 tions, C and C", secured together'b'y a bolt, C3; pet valvedrver vhaving e slot for the tappe@ I 5; i :Thegdrl is secured to the piston-rod by any arm on the valve, and a piston having inverted v of vthe well-known devices in use. I Islflfmlders, substantiallyasdescribed.

1What I eaim sf 4.@{11 afroek-drill, the eombilmton ofzwulvc, v l. Iu,a,r0ekfdrl1,thecombinatonofe a cylinder having; an arc-shaped passage, un 3o eylinderlmvingmainstenmfpnssagesprovided= aremppetvavedriveiganexihaustelmmber-- 1o with brauch passnges and a rotary valve haw er passage' between' vthe valve' vandcylinder,v f jing n, cove oxxcavity :in the ,uppersidm :foimand n tappet-arfm secured to the valve and proing 4the steamehest,' alternately connecting; v jeetiugzthronghthe Iexh:mstlmssrggeinioustot with the branch pass-,ages andthe exhaust or recess in the ztletappet valve-driver, sub-t 35 v y v vpipe, vSubstantially as described stnntialy ns described.

15 2. In :t roekdlil', im arm seeureiyzttttehed; y v :Inltestimonywhereof I affix mysignatme in to the rotaxyvalve in combination with an presence of two witnesses. rvrare, vtmppet, ,an ,are vtanpet-block tttingnto i and forming part of the Cylinder nn'd'hzwing' 'l 'ftABRHAM vJACKSON 'SYPHERJ t :u1 :lle-slmpell hole lengthwise of the b'ioeki, v:zo into Whizehfthemtezmppets lalaeeftndalpis# l Witnesesz` ton with inverted ineines or shoulders, sub vv'GEO'.R.' BYHWGTQN,vv

M. F. HALLEeh;

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